[PATCH] control/limit output of git-rev-list

gitweb.cgi's default view is the log of the last day and git-rev-list
can stop crawling the whole repo if we have all our data to display in the
browser. Also the rss-feed query needs only the last 20 items. This
will speeds up these queries dramatically.

  usage: rev-list [OPTION] commit-id
    --max-count=nr
    --max-age=epoch
    --min-age=epoch

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/rev-list.c b/rev-list.c
index 42fd154..345e24c 100644 (file)
--- a/rev-list.c
+++ b/rev-list.c
@@ -6,9 +6,31 @@ int main(int argc, char **argv)
        unsigned char sha1[20];
        struct commit_list *list = NULL;
        struct commit *commit;
+       char *commit_arg = NULL;
+       int i;
+       unsigned long max_age = -1;
+       unsigned long min_age = -1;
+       int max_count = -1;
 
-       if (argc != 2 || get_sha1(argv[1], sha1))
-               usage("rev-list <commit-id>");
+       for (i = 1 ; i < argc; i++) {
+               char *arg = argv[i];
+
+               if (!strncmp(arg, "--max-count=", 12)) {
+                       max_count = atoi(arg + 12);
+               } else if (!strncmp(arg, "--max-age=", 10)) {
+                       max_age = atoi(arg + 10);
+               } else if (!strncmp(arg, "--min-age=", 10)) {
+                       min_age = atoi(arg + 10);
+               } else {
+                       commit_arg = arg;
+               }
+       }
+
+       if (!commit_arg || get_sha1(commit_arg, sha1))
+               usage("usage: rev-list [OPTION] commit-id\n"
+                     "  --max-count=nr\n"
+                     "  --max-age=epoch\n"
+                     "  --min-age=epoch\n");
 
        commit = lookup_commit(sha1);
        if (!commit || parse_commit(commit) < 0)
@@ -17,6 +39,13 @@ int main(int argc, char **argv)
        commit_list_insert(commit, &list);
        do {
                struct commit *commit = pop_most_recent_commit(&list, 0x1);
+
+               if (min_age != -1 && (commit->date > min_age))
+                       continue;
+               if (max_age != -1 && (commit->date < max_age))
+                       break;
+               if (max_count != -1 && !max_count--)
+                       break;
                printf("%s\n", sha1_to_hex(commit->object.sha1));
        } while (list);
        return 0;